MaterialSkin.MaterialSkinManager.UpdateToolStrip C# (CSharp) Method

        private void UpdateToolStrip(ToolStrip toolStrip, Color newBackColor)
        {
            if (toolStrip == null) return;

            toolStrip.BackColor = newBackColor;
            foreach (ToolStripItem control in toolStrip.Items)
            {
                control.BackColor = newBackColor;
                if (control is MaterialToolStripMenuItem && (control as MaterialToolStripMenuItem).HasDropDown)
                {

                    //recursive call
                    UpdateToolStrip((control as MaterialToolStripMenuItem).DropDown, newBackColor);
                }
            }
        }